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I have Road Network which was selected based on some criteria. Below is image representing it. Each beginning and end of Road Segment is marked with cross:

enter image description here

Selection led to fragmentation of this network. How can I merge (ArcGIS, QGIS) all lines that form consistent continuity, like in image below (colors represent 3 lines which should result after merging). Result of merging – based on below example – should be one layer, with 3 rows, where each row represents grouped lines. Road Network has several attributes, but I am not interested in having them in final, merged output. My goal is to group connected lines:

enter image description here

I have tried few approaches e.g.: Using Dissolve and Multipart to Singlepart in QGIS? Join / merge lines that touch and intersect in QGIS and none of it worked. Dissolve and Multipart-to-Singleparts (QGIS) is not working as expected when 3 lines (or more) are touching each other:

enter image description here

zwornik
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  • Please describe, how dissolve & multi to singlepart didn't work. Because that is the place to go for your task. – Erik Jan 22 '20 at 12:52
  • Dissolve and Multipart-to-Singleparts (QGIS) is not working as expected when 3 lines (or more) are touching each other. That would be an entrance to roundabout in above example. – zwornik Jan 22 '20 at 13:02
  • Using the GRASS tool (under QGIS) v.clean > snap ? (documentation) – J. Monticolo Jan 22 '20 at 13:19
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    By listing three software environments, you are asking at least two questions, violating the One question per Question policy emphasized by the [Tour]. Please [Edit] this question to focus one one environment, and the exact steps you have taken, and the way in which it didn't work. – Vince Jan 22 '20 at 13:21
  • I'd say to just scan down the tools list in QGIS because there is a very obviously named processing tool that would totally split your lines at each intersection. – Gabriel Jan 22 '20 at 13:32
  • @GabrielC. My intention is not splitting but rather opposite. – zwornik Jan 22 '20 at 18:19

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